If you want TMS to use secure ports only, you should increase the Communication Security level to Medium-High at minimum using TMS Tools. However, as you increase the Communication Security level, some functions of TMS will no longer work as expected, refer to "Endpoint Support in Various Communication Modes " section in the TMS 15.4 Admin Guide starting on page 60 for more information, as well as Table 179 in the TMS Tools section of the guide. You can also check the TMS 15.0 Release Notes, as it was when Communication Security was first introduced.